Large-span steel tube tower connecting mechanism for overhead transmission line

The utility model discloses an overhead transmission line large-span steel tube tower connecting mechanism which comprises a steel tube tower body, the upper surface of the steel tube tower body is connected with a fixing block, and one side of the fixing block is connected with an arc-shaped connecting block. The fixing box is fixedly connected to the lower surface of the steel tube tower body, and a connecting groove used for being connected with the arc-shaped connecting block in an inserted mode is formed in the fixing box; the bottom of a clamping plate extrudes a first spring, so that the clamping plate is inserted into a fixing groove through the elastic force of the first spring, and then an arc-shaped connecting block is fixed; one end of a fixing bolt enters a threaded hole in the pulling plate, so that the pulling plate and the clamping plate are fixed by the fixing bolt, and the two groups of steel tube tower bodies can be connected and fixed together; and the tops of the clamping plates are separ